What is the Cloud Service Model?
A cloud service is created from three components, the service definition (.csdef), the service config (.cscfg), and a service package (.cspkg). Both the ServiceDefinition.csdef and ServiceConfig.cscfg files are XML-based and describe the structure of the cloud service and how it’s configured; collectively called the model. The ServicePackage.cspkg is a zip file that is generated from the ServiceDefinition.csdef and among other things contains all the required binary-based dependencies. Azure creates a cloud service from both the ServicePackage.cspkg and the ServiceConfig.cscfg.
Once the cloud service is running in Azure, you can reconfigure it through the ServiceConfig.cscfg file, but you cannot alter the definition. (Source: Microsoft)
The Three Types of Cloud Computing Service Models
1. Software as a Service (SaaS)
The capability provided to the consumer is to use the provider’s applications running on a cloud infrastructure2. The applications are accessible from various client devices through either a thin client interface, such as a web browser (e.g., web-based email), or a program interface. The consumer does not manage or control the underlying cloud infrastructure including network, servers, operating systems, storage, or even individual application capabilities, with the possible exception of limited user-specific application configuration settings.
2. Platform as a Service (PaaS)
The capability provided to the consumer is to deploy onto the cloud infrastructure consumer-created or acquired applications created using programming languages, libraries, services, and tools supported by the provider.3 The consumer does not manage or control the underlying cloud infrastructure including network, servers, operating systems, or storage, but has control over the deployed applications and possibly configuration settings for the application-hosting environment.
3. Infrastructure as a Service (IaaS)
The capability provided to the consumer is to provision processing, storage, networks, and other fundamental computing resources where the consumer is able to deploy and run arbitrary software, which can include operating systems and applications. The consumer does not manage or control the underlying cloud infrastructure but has control over operating systems, storage, and deployed applications; and possibly limited control of select networking components (e.g., host firewalls).
What is meant by cloud-based services?
Cloud-based is a term that refers to applications, services or resources made available to users on demand via the Internet from a cloud computing provider’s servers.
Example of Cloud Computing
Cloud Computing is the use of hardware and software to deliver a service over a network (typically the Internet). … An example of a Cloud Computing provider is Google’s Gmail. Gmail users can access files and applications hosted by Google via the internet from any device.
What are the advantages of using cloud computing?
Advantages of Cloud Computing at a Glance: Drive down costs: Avoid large capital expenditure on hardware and upgrades. Cloud can also improve cost efficiency by more closely matching your cost pattern to your revenue/demand pattern, moving your business from a capital-intensive cost model to an Opex model.
How does the cloud storage work?
Instead of storing information to your computer’s hard drive or another local storage device, you save it to a remote database. The Internet provides the connection between your computer and the database.
Is the cloud safe?
Data security is a major concern, and although options are currently limited, they exist. The most secure is likely a military grade encryption from providers like Credeon or nCrypted Cloud. … However, the biggest cause of concern for Cloud storage isn’t hacked data, it’s lost data.
5 Essential Characteristics:
1. On-demand self-service
A consumer can unilaterally provision computing capabilities, such as server time and network storage, as needed automatically without requiring human interaction with each service’s provider.
2. Broad network access
Capabilities are available over the network and accessed through standard mechanisms that promote use by heterogeneous thin or thick client platforms (e.g., mobile phones, laptops, and PDAs).
3. Resource pooling
The provider’s computing resources are pooled to serve multiple consumers using a multi-tenant model, with different physical and virtual resources dynamically assigned and reassigned according to consumer demand.
There is a sense of location independence in that the customer generally has no control or knowledge over the exact location of the provided resources but may be able to specify location at a higher level of abstraction (e.g., country, state, or datacenter). Examples of resources include storage, processing, memory, network bandwidth, and virtual machines.
4. Rapid elasticity
Capabilities can be rapidly and elastically provisioned, in some cases automatically, to quickly scale out and rapidly released to quickly scale in. To the consumer, the capabilities available for provisioning often appear to be unlimited and can be purchased in any quantity at any time.
5. Measured Service
Cloud systems automatically control and optimize resource use by leveraging a metering capability at some level of abstraction appropriate to the type of service (e.g., storage, processing, bandwidth, and active user accounts). Resource usage can be monitored, controlled, and reported providing transparency for both the provider and consumer of the utilized service.
1. Private Cloud
The cloud infrastructure is operated solely for an organization. It may be managed by the organization or a third party and may exist on premise or off premise.
2. Community Cloud
The cloud infrastructure is shared by several organizations and supports a specific community that has shared concerns (e.g., mission, security requirements, policy, and compliance considerations). It may be managed by the organizations or a third party and may exist on premise or off premise.
3. Public Cloud
The cloud infrastructure is made available to the general public or a large industry group and is owned by an organization selling cloud services.
4. Hybrid Cloud
The cloud infrastructure is a composition of two or more clouds (private, community, or public) that remain unique entities but are bound together by standardized or proprietary technology that enables data and application portability (e.g., cloud bursting for load-balancing between clouds).
Cloud computing is a model for enabling convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction
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